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1 Metaplastic cells (immature squamous cells) New squamous cells at the squamocolumnar junction are continuously replacing columnar cells. 2  These new squamous cells are called metaplastic cells.3  The area of cell replacement is called the transformation zone. The normal cervix has two types of cells on the surfaceâsquamous cells and columnar (glandular or mucus producing) cells. 2  Additionally, new squamous cells are identified as metaplastic cells.
Squamous cell carcinoma of the lung is a type of lung cancer. It occurs when abnormal lung cells multiply out of control and form a tumor. Eventually, tumor cells can spread (metastasize) to other parts of the body including the. lymph nodes around and between the lungs. liver. bones. adrenal glands.